Deadeye008
Hambone
- Joined
- Jan 18, 2012
- Messages
- 742
2.8 is useful if you are shooting moving subjects in low light but if you are using a tripod and shooting basically static objects(stars) the 4.0 should be fine. I shoot startrails all the time with my Tokina 10-17m f3.5-4.5 and I just use a little longer shutter speed than when shooting at 2.8. I do love my set of 28mm 50mm and 85mm 1.8 primes though but mostly for their boque when shot @ 1.8-2.2